BACKGROUND: After a human being ingests a cysticercus, the larval stage of Taenia solium, the cysticercus gradually develops toward the adult parasite. In this paper, we describe the sequential progress of evagination of cysticerci. METHODS: Intact cysticerci were obtained from swine muscle, and incubated in bovine bile to stimulate evagination. Dissecting, light, and electron microscopy of whole parasites and histologic sections were used for photographic registers. RESULTS: The first event was the widening of the opening of the bladder wall for the scolex and neck to emerge. The two chambers that conform the cysticercus were identified. Histologic sections provided explanation for the conformation of the spiral canal. The scolex uncoils during evagination but does not turn inside out. CONCLUSIONS: The scolex and the neck comprise a different structure from the bladder wall, although they are contiguous.
BACKGROUND: After a human being ingests a cysticercus, the larval stage of Taenia solium, the cysticercus gradually develops toward the adult parasite. In this paper, we describe the sequential progress of evagination of cysticerci. METHODS: Intact cysticerci were obtained from swine muscle, and incubated in bovine bile to stimulate evagination. Dissecting, light, and electron microscopy of whole parasites and histologic sections were used for photographic registers. RESULTS: The first event was the widening of the opening of the bladder wall for the scolex and neck to emerge. The two chambers that conform the cysticercus were identified. Histologic sections provided explanation for the conformation of the spiral canal. The scolex uncoils during evagination but does not turn inside out. CONCLUSIONS: The scolex and the neck comprise a different structure from the bladder wall, although they are contiguous.
Authors: Marco Coral-Almeida; Sarah Gabriël; Emmanuel Nji Abatih; Nicolas Praet; Washington Benitez; Pierre Dorny Journal: PLoS Negl Trop Dis Date: 2015-07-06
Authors: Romel Hernández-Bello; Galileo Escobedo; Julio Cesar Carrero; Claudia Cervantes-Rebolledo; Charles Dowding; James Frincke; Chris Reading; Jorge Morales-Montor Journal: Biomed Res Int Date: 2012-12-20 Impact factor: 3.411